Lotus Petal

{T}, Sacrifice Lotus Petal: Add one mana of any color.

Etherium Sculptor

Artifact spells you cast cost {1} less to cast.

{1}, {T}, Sacrifice Chromatic Star: Add one mana of any color.
When Chromatic Star is put into a graveyard from the battlefield, draw a card.

When Myr Retriever dies, return another target artifact card from your graveyard to your hand.

When Prophetic Prism enters, draw a card.
{1}, {T}: Add one mana of any color.

Galvanic Blast deals 2 damage to any target.
Metalcraft — Galvanic Blast deals 4 damage instead if you control three or more artifacts.

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
Draw two cards.

This spell costs {2} less to cast if you control a Human creature and a non-Human creature.
Draw two cards.

When Workshop Assistant dies, return another target artifact card from your graveyard to your hand.

Whenever an artifact is put into a graveyard from the battlefield, you may have target opponent lose 1 life.

Whenever an artifact you control enters, Reckless Fireweaver deals 1 damage to each opponent.